CN103282709B - For the method and apparatus of the welding of pipeline - Google Patents

For the method and apparatus of the welding of pipeline Download PDF

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Publication number
CN103282709B
CN103282709B CN201180064211.6A CN201180064211A CN103282709B CN 103282709 B CN103282709 B CN 103282709B CN 201180064211 A CN201180064211 A CN 201180064211A CN 103282709 B CN103282709 B CN 103282709B
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CN
China
Prior art keywords
welding
band
temperature
pipeline
resistance
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201180064211.6A
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Chinese (zh)
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CN103282709A (en
Inventor
谢尔·里德斯特伦
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TSC Innovation AB
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TSC Innovation AB
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Publication of CN103282709A publication Critical patent/CN103282709A/en
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Publication of CN103282709B publication Critical patent/CN103282709B/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
    • F16L47/02—Welded joints; Adhesive joints
    • F16L47/03—Welded joints with an electrical resistance incorporated in the joint
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
    • B29C65/344—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint being a woven or non-woven fabric or being a mesh
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
    • B29C65/3444—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint being a ribbon, band or strip
    • B29C65/3448—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint being a ribbon, band or strip said ribbon, band or strip being perforated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3468—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the means for supplying heat to said heated elements which remain in the join, e.g. special electrical connectors of windings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7841—Holding or clamping means for handling purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/303—Particular design of joint configurations the joint involving an anchoring effect
    • B29C66/3034—Particular design of joint configurations the joint involving an anchoring effect making use of additional elements, e.g. meshes
    • B29C66/30341—Particular design of joint configurations the joint involving an anchoring effect making use of additional elements, e.g. meshes non-integral with the parts to be joined, e.g. making use of extra elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/532—Joining single elements to the wall of tubular articles, hollow articles or bars
    • B29C66/5324—Joining single elements to the wall of tubular articles, hollow articles or bars said single elements being substantially annular, i.e. of finite length
    • B29C66/53241—Joining single elements to the wall of tubular articles, hollow articles or bars said single elements being substantially annular, i.e. of finite length said articles being tubular and said substantially annular single elements being of finite length relative to the infinite length of said tubular articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/532—Joining single elements to the wall of tubular articles, hollow articles or bars
    • B29C66/5326—Joining single elements to the wall of tubular articles, hollow articles or bars said single elements being substantially flat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • B29C66/7232—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer
    • B29C66/72321—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer consisting of metals or their alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/727—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being porous, e.g. foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8145—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/81471—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps being a wrap-around tape or band
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/818—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B29C66/8187—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the electrical insulating constructional aspects
    • B29C66/81875—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the electrical insulating constructional aspects of the clamps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/828—Other pressure application arrangements
    • B29C66/8286—Hand placed clamps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
    • B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
    • B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
    • B29C66/91211—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature with special temperature measurement means or methods
    • B29C66/91214—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature with special temperature measurement means or methods by measuring the electrical resistance of a resistive element belonging to one of the parts to be welded, said element acting, e.g. as a thermistor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
    • B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
    • B29C66/91221—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
    • B29C66/9131—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the heat or the thermal flux, i.e. the heat flux
    • B29C66/91311—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the heat or the thermal flux, i.e. the heat flux by measuring the heat generated by Joule heating or induction heating
    • B29C66/91313—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the heat or the thermal flux, i.e. the heat flux by measuring the heat generated by Joule heating or induction heating by measuring the voltage, i.e. the electric potential difference or electric tension
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
    • B29C66/9131—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the heat or the thermal flux, i.e. the heat flux
    • B29C66/91311—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the heat or the thermal flux, i.e. the heat flux by measuring the heat generated by Joule heating or induction heating
    • B29C66/91315—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the heat or the thermal flux, i.e. the heat flux by measuring the heat generated by Joule heating or induction heating by measuring the current intensity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
    • B29C66/9131—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the heat or the thermal flux, i.e. the heat flux
    • B29C66/91311—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the heat or the thermal flux, i.e. the heat flux by measuring the heat generated by Joule heating or induction heating
    • B29C66/91317—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the heat or the thermal flux, i.e. the heat flux by measuring the heat generated by Joule heating or induction heating by measuring the electrical resistance
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
    • B29C66/91411—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature of the parts to be joined, e.g. the joining process taking the temperature of the parts to be joined into account
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
    • B29C66/91431—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature the temperature being kept constant over time
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9161—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux
    • B29C66/91651—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux by controlling or regulating the heat generated by Joule heating or induction heating
    • B29C66/91653—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux by controlling or regulating the heat generated by Joule heating or induction heating by controlling or regulating the voltage, i.e. the electric potential difference or electric tension
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9161—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux
    • B29C66/91651—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux by controlling or regulating the heat generated by Joule heating or induction heating
    • B29C66/91655—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux by controlling or regulating the heat generated by Joule heating or induction heating by controlling or regulating the current intensity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/96—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process
    • B29C66/961—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process involving a feedback loop mechanism, e.g. comparison with a desired value
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L21/00—Joints with sleeve or socket
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
    • F16L47/02—Welded joints; Adhesive joints
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
    • F16L55/168—Devices for covering leaks in pipes or hoses, e.g. hose-menders from outside the pipe
    • F16L55/17—Devices for covering leaks in pipes or hoses, e.g. hose-menders from outside the pipe by means of rings, bands or sleeves pressed against the outside surface of the pipe or hose
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/14—Arrangements for the insulation of pipes or pipe systems
    • F16L59/16—Arrangements specially adapted to local requirements at flanges, junctions, valves or the like
    • F16L59/18—Arrangements specially adapted to local requirements at flanges, junctions, valves or the like adapted for joints
    • F16L59/20—Arrangements specially adapted to local requirements at flanges, junctions, valves or the like adapted for joints for non-disconnectable joints
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
    • G05D23/24—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a resistance varying with temperature, e.g. a thermistor
    • G05D23/2401—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a resistance varying with temperature, e.g. a thermistor using a heating element as a sensing element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3472—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint
    • B29C65/3476—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint being metallic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8122—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the composition of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B29L2023/22—Tubes or pipes, i.e. rigid
    • B29L2023/225—Insulated
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K2217/00—Temperature measurement using electric or magnetic components already present in the system to be measured

Abstract

The present invention relates to the method for the welding of the sleeve (7) of a kind of pipeline for welding polymer material (1) and welding polymer material, wherein pipeline has end (1a, 1b), wherein the method comprises: be arranged on the end (1a, 1b) of pipeline by sleeve (7) in an overlapping arrangement; By arranging conductive strips (L, 9) between pipeline (1) and sleeve (7) sleeve (7) is soldered to the end (1a, 1b) of pipeline, this band is permeable for molten plastic; And by feed cable (M) by power supply (PU-DC, PU-AC) band (L is connected to, 9), and for induced current with heating tape (L, 9) and the polymer material of surrounding, they are around melted in together to form welding at band (L, 9), and wherein the method comprises: the original ambient temperature T that the pre-test in heating tape is welded 0; Voltage U in measuring tape l; Measure the electric current I being supplied to band l; The initial resistance R of band was calculated before heating tape 0; The electric current being supplied to band is caused to increase; Based on the resistance R of voltage with the Current calculation band recorded; Calculate the changes delta R of resistance; Based on the increase Δ T of the temperature of the change calculations band of resistance, and by the original ambient temperature T by welding 0the temperature T of welding is calculated with the increase ΔTXiang Calais of the temperature of band w.The invention still further relates to the device of the welding of a kind of pipeline for welding polymer material (1).

Description

For the method and apparatus of the welding of pipeline
Technical field
The present invention relates to a kind of method and apparatus of welding of the pipeline for welding polymer material.
Background technique
Known, by utilizing sleeve (comprise heating element can the cylindrical pipe connector of welding consumables) by the pipeline welding of welding polymer material together.The end of pipeline is introduced in sleeve, and forms welding region together with sleeve.Heating element is supplied with electric current, this heating element normally coil, and the end of the pipeline in welding region and sleeve are heated to and make the such high temperature of the end of pipeline together with sleeve weld by this electric current.Heat must be supplied within the sufficiently long time period, to make the temperature in welding region become enough high, to be mechanically firmly and to form high-quality soldering and sealing.If supply insufficient heat, part welding region can not reach the temperature of expectation, and the fusing of expection can not occur, and this will cause low-quality welding.In contrast, if supply too many heat, situation is like this, exists because the distortion of pipeline is by the risk of the material in the end of damage pipeline and sleeve.Therefore, importantly, the supply of heat is carefully controlled, to supply enough heat in certain certain time, to form high-quality welding between the end and sleeve of pipeline.
In order to address this problem, appear in welding region territory and thermocouple is set.By this way can measuring tempeature, and based on this, can determine how the temperature in welding develops and when terminate welding operation.But certified is such fact: be difficult to arrange thermocouple in a satisfactory manner in welding region, and in addition, thermocouple only indicates the temperature at a single point place.Also exist and will occur that between thermocouple and heating element electrical contact causes the risk of measurement error.In addition, in order to control temperature development, may need externally measured instrument, this causes larger equipment and the cost of Geng Gao.
Second existing method of supplying for controlling heat is use experience method (prediction), such as, by terminating welding operation after a certain predetermined amount of time (it is intended to correspond to a certain temperature in welding region).But uncertain, whether the intensity of the welding formed and quality meet strict demand, because external factor always directly will affect result.
Description of the invention
An object of the present invention is to provide so a kind of method and apparatus, that is, the method and device make can welding consumables pipeline weld period with simple, effectively and the mode of safety carry out reliable temperature control and high-quality possibility be welded into be formed to the control of the heat being supplied to welding region.
This object utilizes the method for the welding of the sleeve of a kind of pipeline for welding polymer material and welding polymer material to realize, and wherein, pipeline has end.The method comprises: arrange sleeve overlappingly with the end of pipeline; By arranging conductive strips (it is permeable for molten plastic) by sleeve weld between pipeline and sleeve to the end of pipeline; And by electricity cable, power supply is connected to band.For induced current with the polymer material of heating tape and surrounding, they are melted in together to form welding around band.The method comprises: the original ambient temperature that the pre-test in heating tape is welded; Voltage U in measuring tape l; Measure the electric current I being supplied to band l; The initial resistance R of measuring tape before heating tape fully 0; The electric current being supplied to band is caused to increase; Based on voltage U lwith the electric current I recorded lcalculate the resistance R of band; Calculate the change of the resistance of band; Based on the increase Δ T of the temperature of the change calculations band of resistance; And by the increase Δ T of the original ambient temperature of welding and the temperature of band is added together the temperature T calculating welding w.
An advantage according to method of the present invention is, the resistance R calculated corresponds to the resistance in whole conductive strips.Thus, based on the change of the resistance in whole band, the increase of the temperature of welding that calculates corresponds to the average increase of the temperature of whole welding.
The method means, monitors during the welding operation of pipeline to temperature.This provide about whether being enough to the supply of heat of welding to guarantee that formed welding meets the information very reliably of the strict demand to uniformity, mechanical strength and sealing.Thus, method according to the present invention is a kind of effective ways of welding of monitoring welding operation and being formed.
Another advantage according to method of the present invention is, by based on to supplied electric current I during whole welding operation lwith the voltage U brought lthe change of direct survey calculation resistance carry out the temperature T that welds wdetermination and the supervision of increase of temperature to welding.Obtain reliably by this way and the result of safety, wherein made the impact of error source minimize.
It is known that the resistance of metal increases along with temperature and increases.The temperature coefficient of resistance represents this correlation and is well-known special material performance.
Another advantage of the method is, can calculate the relative change of the resistance of band, and does not thus need the absolute value of the resistance be with to be in a certain predeterminated level, and just continuously can determine the absolute value of resistance.The change of the temperature of welding is calculated based on the relative change of resistance and the temperature coefficient of resistance.This means, the size of the determination of the temperature of welding and the size of pipeline and band has nothing to do.
By the temperature of welding that calculates compared with the predetermined final temperature of welding.Continue welding, until the temperature of welding reaches the final predetermined temperature of welding, and kept stable, remained on the final predetermined temperature section of lower predetermined time of welding.Welding operation is stopped after predetermined time, section terminated.When the temperature of welding has reached the final predetermined temperature of welding and has kept at this temperature stablize in predetermined time section, termination welding operation.
Alternatively, welding operation can be stopped when realizing the predetermined variation of the resistance be with.Certainly, also welding operation can be stopped after a certain period of time.
Be connected at least one power supply on voltage (such as grid voltage) source for obtaining electric current.Power supply can be DC electrical source or ac power supply.Due to its lower cost and weight, the ac power supply worked in high frequency is preferred.
For the supply (particularly in high frequency) of Ac, the calculating of the resistance according to the method should be adopted, so that for the circuit counting impedance comprising power supply, feed cable and band.Because impedance is plural number, advantageously, the impedance of the circuit of the inductance in feed cable and resistance is had to calculate the resistance of band based on compensation.
The invention still further relates to the device of the welding of the sleeve of a kind of pipeline for welding polymer material and welding polymer material, wherein pipeline has end, and the end of its middle sleeve and pipeline is arranged overlappingly, wherein device comprises: conductive strips, and these conductive strips are permeable for molten plastic and are arranged between the end of pipeline and sleeve; And power supply PU-DC, the PU-AC of supply for electric current, this power supply PU-DC, PU-AC are connected to band by feed cable, for the polymer material of heating tape and surrounding, them are made to be melted in together to form welding around band, wherein this device comprises control and regulon SR, and this control and regulon SR have: measure and regulate the device CS being supplied to the electric current of band; Measure and adjusting belt on voltage U ldevice VS; Thermocouple TS, for the original ambient temperature T welded 0measurement; And computing unit CU, for the temperature T with the resistance R in L and welding wcalculating.
Device according to the present invention demonstrates the advantage corresponding with method as above and technical performance.
Thus, the present invention limit a kind of under temperature controls for the method and apparatus of the welding of the pipeline of welding polymer material.
Disclose the embodiment provided as an example in the dependent claims.
Other distinctive features of the present invention and advantage will be clearly demonstrated in describing in detail below of the present invention; this detailed description forms example and therefore should not explain by this way; that is, for protection category of the present invention, these feature and advantage are restrictive.In order to promote understanding, comprised the reference to accompanying drawing in the body of the email, wherein equivalence or similar parts provided identical reference number.
The summary of accompanying drawing
Figure 1A schematically shows the device according to an embodiment of the invention be arranged in welding region.
Figure 1B schematically shows the device be according to a second embodiment of the present invention arranged in welding region.
Fig. 2 schematically shows the device being according to another embodiment of the present invention arranged in welding region.
Fig. 3 illustrates and can be used for shown in figure 2 according to the circuit diagram of the power supply of device of the present invention.
Fig. 4 illustrates the circuit diagram of two power supplys for type shown in Figure 3, and these two power sources in series connect and can be used for shown in figure 2 according to device of the present invention.
Fig. 5 illustrates the example of the pipeline that method and apparatus according to the present invention can be utilized to weld.
Fig. 6 schematically shows the separated stereogram of parts of pipe coupling wherein shown in Figure 5.
Fig. 7 illustrates sleeve shown in Figure 5 and conductive strips.
Fig. 8 illustrates the cross section of band.
Describe in detail and embodiment
The welding of the pipeline for all types of welding polymer material is suitable for admirably according to method and apparatus of the present invention.The method is particularly conducive to the installation of heat insulation pipeline and the use during repairing, this heat insulation pipeline is local heating pipeline, Local cooling pipeline and the pipeline for oil such as, this pipeline being used for oil is by can the outer tube of polymer material (as polyethylene, being called PEHD) of solder flux and the interior pipe that is usually made up of the steel embedded in the thermal-protective material of polyurethane foam (PUR) form.
Figure 1A schematically shows the device A1(welding equipment according to an embodiment of the invention being arranged in welding region).This device comprises power supply PU-DC and load L, and this load L comprises conductive strips and feed cable M.
Power supply PU-DC is the DC electrical source of traditional character, and this power supply PU-DC has the 50Hz transducer such as with hard switching source electronics and rectifier.Such power supply works usually in frequency range 75-150kHz, and must carry out rectification and filtration to output voltage, to meet the requirement of EMC instruction.By feed cable M, power supply PU-DC is connected to load L(conductive strips), and thus form circuit.
Device A1(welding equipment) also comprise the control and regulon SR with voltage transducer VS and current sensor CS.Voltage transducer VS is connected to and is arranged in load L(and is with) near tie point K1, K2, for the voltage U brought lmeasurement.
The following describes and in figs. 5 to 8 welding region is shown, wherein between two end 1a and 1b and sleeve 7 of the pipeline of welding polymer material, introducing conductive strips 9.
Load L(is with) net can be comprised or there are other objects of net character, these other objects are the stainless steel expander metal with the opening be arranged in regularly on surface.Such as, this can be the stainless steel thin slice utilizing little rectangular opening perforation, to form the web frame of sharp outline.Thus, the parameter of known materials, the such as temperature coefficient of its resistance.Advantageously, select the band (net) of the temperature coefficient with resistance in relatively narrow scope, so that can the rising of acceptable accuracy computation temperature.
Load L(is with) be connected to power supply PU-DC by feed cable M, such electric current I can be supplied l, this electric current is enough to temperature band and the welding region of surrounding being heated to melt polymer material (plastic material), so that they are melted in together to form welding by band around being with.
Control and regulon SR(such as, computer unit) for control, regulate and monitor welding operation.
Control and regulon SR comprise the electric current I for being supplied to band lmeasurement and the device CS of adjustment, such as, galvanometer, amperemeter, current sensor or power pack.
Control and regulon also comprise the voltage U for being supplied to band lmeasurement and the device VS of adjustment, such as, voltmeter or voltage transducer.
Voltage transducer VS can be with closing on load L() the tie point K1 that arranges, the voltage U in K2 place measuring tape l.Like this, the error source in measuring is avoided, the voltage drop in such as feed cable M.Voltage drop in feed cable M changes according to the length of feed cable, and thus advantageously, directly closes on load (band) measuring voltage.
Control and regulon SR also comprise the device TS of the measurement for the original ambient temperature of welding, such as thermoelectricity occasionally temperature transducer.Temperature transducer TS is located so that the ambient temperature can measuring the installed position closing on pipeline and sleeve.
Control and regulon SR also comprise the computing unit CU of the Continuous plus for the following, such as, and the resistance R in band and the changes delta R of resistance, the relative change R of resistance rel, the temperature of band and the change Delta T of temperature, and the temperature T of welding w.
Control and regulon SR also comprise storage unit MEM, this storage unit MEM has the information of the factory calibration of the other materials special parameter of the temperature coefficient about resistance stored therein and the various types of band used during such welding operation or net, and the information of the material particular conversion factor about the calculating for the temperature in welding.Conversion factor is the direct function of the temperature coefficient of resistance.If such as the temperature variation of 200 DEG C, the resistance R of band increases by 20%, will be 10 degrees Celsius for obtaining the conversion factor of the actual change of temperature.
The information of correlation between storage unit MEM also has about the change of the temperature in the change of resistance and band, and about the information of the temperature of welding and the relation between the size of pipeline and other operational conditions.Storage unit MEM also comprises the information about the function needed for the calculating in computing unit.Storage unit stores such as about the information of welding operation continuously, such as about endurance, temperature, be supplied to the electric current I of band land the voltage U brought l, the initial resistance R of band, and the information of the resistance of band during welding procedure.
Figure 1B schematically shows the second embodiment according to device A2 of the present invention, and wherein voltage transducer VS measures the voltage U at tie point K1, K2 place be directly arranged in the output of power supply PU-DC l.Such design voltage sensor VS comprises the compensation of voltage along the decline of feed cable to make it.
Fig. 2 schematically shows another embodiment according to device A3 of the present invention.Device A3(welding equipment A3) comprise power supply PU-AC and the load L comprising conductive strips and feed cable M.Power supply PU-DC is connected to conductive strips (load) by feed cable M, and thus forms circuit.
Power supply PU-AC is the ac power supply of traditional character with thyristor operation.
As alternative, ac power supply PU-AC can comprise quasi resonant power converter B that the is described below and type illustrated in figures 3 and 4.Effectively work especially under the frequency of such power converter in interval 20-50kHz, and it has best size and weight.This power supply has robust designs, and at power stage mouth place at all without any rectifier or filter circuits, this is very favorable.This causes the minimizing of the cost of power supply, higher efficiency and lower volume and weight.Utilize power semiconductor and converter design quasi resonant power converter B, this transducer B provide the electric current with sine wave.With at still higher frequencies and compared with the situation that power transfer (this is the modification of conventional art) occur in DC output, utilize low harmonic content and do not need the harmonic wave filtered in frequency range 20-50kHz, obtain favourable voltage characteristic.
Control in welding equipment A3 and regulon SR also comprise the control unit CUI for impedance.Be with because load L(is led in power supply PU-AC measurement) Ac, the control unit CUI for impedance calculates the impedance of circuit for comprising power supply, feed cable and band.During the measurement of high-frequency alternating current, load L is by as complex impedance process.When calculating the resistance of band, therefore, the impedance of the circuit of the inductance in feed cable and resistance should be had to calculate resistance based on compensation.
Welding procedure
Can suppose, the initial temperature of the welding region before welding operation corresponds to the ambient temperature of mounting point.Ambient temperature depends on mounting point and season, and is usually located at-30 DEG C, interval in 40 DEG C.
Electric current be connected to band and before heating tape, utilizing the original ambient temperature T of the temperature transducer TS measurement welding controlled and in regulon SR 0.
By reducing the electric current being supplied to soldering appliance (band), start welding procedure.Electric current can be direct current or Ac.In the time very early, after starting welding procedure in time of about 1 second, before adding thermal weld, be supplied to the electric current I of band by current measurer measurement l, and by the voltage U in Voltage measure measuring tape l.Before heating tape, based on electric current and voltage, control and regulon calculate the initial resistance R of band 0.Based on voltage and the electric current recorded (and it corresponds to ratio U/I), in computing unit CU, calculate resistance R.Will about initial resistance R 0information store in the memory unit.During whole welding operation, control and regulon utilize current measurer CS to measure the electric current I of supplying continuously l, and utilize the voltage U in Voltage measure measuring tape l.
Subsequently, control and regulon SR cause the electric current being supplied to band to increase.Such as, the initial current of band can be about 15-18A, and it can be elevated to 25-30A during welding operation.This causes ratio U/I(, and it corresponds to the resistance R in being with) little by little rise along with temperature and increase.During whole welding operation, calculated the changes delta R of the resistance of the resistance R in being with and band by computing unit CU.Resistance R corresponds to the resistance in whole conductive strips.
Subsequently, computing unit CU calculates the increase Δ T of the temperature of band based on the changes delta R of resistance and the material particular conversion factor.
Can suppose, the temperature T of welding wminimum difference is only had with the temperature of band.Therefore, by the original ambient temperature T by welding 0the temperature T of welding is calculated with the increase ΔTXiang Calais of the temperature of band w.
Because the change based on the resistance in whole band calculates the increase of the temperature of the welding calculated, the increase of the temperature of the welding calculated corresponds to the average increase of the temperature of whole welding.
During whole welding operation, based on to supplied electric current I lwith the voltage U brought ldirect measurement, the temperature T welded by the calculating of the changes delta R to resistance R and resistance wdetermination and the monitoring of increase of temperature of welding.Obtain the reliable and result of safety in such processes, wherein make the impact of error source minimize.
The instantaneous temperature T welded is controlled according to the predetermined curve of the size and operational condition that depend on pipeline w.When the temperature of welding has risen and followed whole path according to these curves, complete welding operation.
During welding operation, by the temperature T of welding calculated wwith the predetermined final temperature T welded fcompare.Prove it is such as such situation, in order to obtain high-quality welding, should by the weld heating of pipeline that is made up of polyethylene (such as, highdensity polythene PE HD) to about 250 DEG C.
The relative change R of the resistance of band can be calculated during welding operation rel.The relative change of resistance is expressed as from initial resistance R 0the percentage change risen.Based on the relative change R of resistance relthe change of the temperature of welding also can be calculated with the temperature coefficient of known resistance.This is favourable, because the temperature T of welding wto be determined at be have nothing to do with the size of the size of pipeline and band.
Welding continues until reached the temperature T of welding w, caused the temperature T of welding wreach final predetermined temperature T fand kept stable, and at the final predetermined temperature T of welding flower maintenance predetermined time section.After predetermined time, section terminated, stop welding operation.When reaching the temperature of welding, stop welding operation, and at the final predetermined temperature T of welding funder in predetermined time section, keep stable.Such as, carry out the determining time by operational condition (such as, the thickness of tube wall).
Alternatively, when obtaining the predetermined variation Δ R of resistance of band, welding operation can be stopped.The advantage stopping welding operation when there is the change of predetermined resistance is, the change of resistance corresponds to a certain rising of the temperature of whole band (its be wherein with contact pipeline with the rising of the temperature in the welding region of sleeve be substantially identical).Like this, effectively and accurately heat supply can be controlled.
Thus, the method means, is controlled the temperature of the weld period of pipeline by the mean temperature of determined whole welding.By the mean temperature of whole welding determined continuously during welding operation, can accurately control and monitor heat supply.
The temperature of band rises a little more quickly than the true temperature in the various piece of welding at first.Such as, the temperature of the material in the wall of tube wall and sleeve little by little rises during welding operation.Therefore, during the starting stage of welding, in the wall of pipeline and sleeve, there is temperature gradient.After executed welding operation a period of time, make temperature gradient average, and the material (throughout material with at surrounding materials) in the wall of pipeline and sleeve reaches the melting point of expectation, and form high-quality welding.
In order to the difference between the temperature of compensating band and the true temperature of welding, for induced current to cause the temperature of band to reach first of temperature during the heating period of welding operation raise desired value T 1.The first object value of selective temperature, with the predetermined final temperature T making it exceed welding fsuch a value, that is, this value depends on the actual size of pipeline.
Continue predetermined time heating period section.During the heating period, start the increase of the temperature of welding, and be with, between pipeline and sleeve, forming good contact.
Then, in order to make the temperature equalization of the temperature gradient in material become possibility, be then the balance stage in welding operation, and form uniform welding.During this balance stage, pipeline and sleeve is caused to reach the predetermined final temperature T of the expectation of welding f.During balance stage, little by little reduce electric current, with the second desired value T causing the temperature of band to reach temperature 2, the second desired value T of temperature 2slightly lower than the first object value T of temperature 1.Thus, the first object value of temperature is higher than the second desired value T of temperature 2.Second desired value T of selective temperature 2, so that it is in close proximity to the predetermined final temperature T of welding f.During balance stage, make the temperature T of welding wbe stabilized in the predetermined final temperature T of welding funder, make the temperature gradient of the material in tube wall and sleeve balanced, and whole materials reach the predetermined final temperature T of welding f.As the temperature T of welding wreach the predetermined final temperature T of welding fand when balance stage has continued a certain predetermined amount of time, terminate welding operation.The determining time is carried out by operational condition (such as, the thickness of material and character).In addition in order to ensure welding, there is the quality of expectation and guarantee temperature gradient in material balanced and do like this.
Preferably, as long as carry out welding operation, just carry out supplied electric current I continuously land voltage U lmeasurement.Advantageously, in order to realize the good control of the heat being supplied to welding, the calculating of the following is also carried out continuously: the resistance R of band, the changes delta R of the resistance of band, the resistance of band changes R relatively rel, the change Delta T of the temperature of band and the temperature T of welding w.
Fig. 3 illustrates the circuit diagram for power supply PU and transducer 32, and this power supply PU has quasi resonant power converter B and this power supply PU is connected to grid voltage, and this transducer is connected to welding equipment and electrode 21.Quasi resonant power converter B has the diode 33 for full wave rectifier, combined type FET-driver 34 and oscillator 35, and has the half-bridge 36,37 of semiconductor.Power converter B also has choke 38 and capacitive divider (capacitive voltage divider), and this capacitive divider has two condensers 39,40 be connected in series with the primary air 32 of transducer.Under the frequency being greater than resonant frequency, thisly be connected to form Zero voltage transition and electric current, this electric current has the form of sinusoidal segment ripple, is wherein formed by transducer choke 38 and goes up a slope and the descending (obtaining title " quasi-resonance " thus) of condenser 39,40 formation electric current.This is favourable, because when not having a large amount of filtrations, obtains low harmonic content, and easily in total, reaches the requirement relevant with electromagnetic interference (EMC).
As previously mentioned, quasi resonant power converter B is preferably at the operation at frequencies of interval 20-50kHz.Described range between a frequency means, the commercial particular components being called " IGBT module " (it is the abbreviation of " insulated gate bipolar transistor module "), this particular components is particularly suitable in the design according to quasi resonant power converter of the present invention.
Further, little light transducer is commercial available, and it is particularly suitable for power converter B.Such transducer contributes to low volume and weight.
Even if power stage lacks rectifier and traditional output filter and therefore output voltage is completely unfiltered, but can realize high efficiency and the low requirement to additional filtration by the design by this way of power cell.
Importantly, power supply PU is light and easy-to-use, welding when this power supply PU is used for the installation of the heat-insulating pipeline in field and repairs and the welding of installed position.Meanwhile, the requirement of high-output power should be provided to rise to the power supply for welding.For this purpose, provide two power supply PU-AC in identical unit with quasi resonant power converter B, so this unit can weld each weld period at the same time for independent operation, or be connected in series in order to full power when weld diameter reaches the large welding of 2 meters.
Fig. 4 illustrates the circuit diagram for two power supply PU, and these two power supply PU comprise quasi resonant power converter B, and wherein in order to interact and increase the performance number of output voltage, power supply is connected in series on the output side.Such as, reaching the weld period of large welding of 2 meters, when needing high output voltage, this is favourable.Two quasi resonant power converter B operate simultaneously and perform the summation (summation function) of output voltage, and this causes such fact, that is, without the need to carrying out the previous correction of each output, rectification or filtration.This causes the supply of effective power transfer and electric current, and this carries out when not having energy loss.As shown in Figure 4, each power supply can be connected to its voltage source, but, very advantageously, each power supply is connected to its phase L1 and the L2 of identical voltage source.For three phase mains, by this way, power stage is limited to every phase 16A effectively, for three phase mains, this is the level that normally fuses, and makes maximum power output double simultaneously.
Realize being connected in series by the primary side connecting each transducer.In order to make the effective value of output voltage double become possibility, transmit link 41(such as, by optic coupling element, signal converter or similar insulating signal transferring elements by insulating signal), make oscillator synchronization.Quasi resonant power converter complete (100%) is forced synchronously to operate by this way.This causes the effective value of output voltage to double, because relative to the switching frequency of half-bridge, the output voltage on transducer is in 100% homophase.120 degree of phase shifts are in the input voltage of quasi resonant power converter, but this does not affect doubling of the effective value of output voltage.
Fig. 5-8 illustrates the example of the pipeline that device according to the present invention can be utilized to weld.Such as, pipeline is local heating pipeline, Local cooling pipeline or the pipeline for oil, and this pipeline being used for oil is made up of the interior pipe formed in the outer tube of welding polymer material (polyethylene (PEHD) as high density polyethylene (HDPE) type) and the insulating material usually by embedding polyurethane foam (PUR).
The most important thing is, between new installation period and during the reparation of pipeline, realize high quality and the installation of high strength and connection.On long terms, for the macroeconomic of local heating network, the systematic error in insecure quality or in the worst case assembling may be all catastrophic.
Fig. 5 illustrates the pipeline comprising the outer tube 1 of welding polymer material and the interior pipe 2 of steel.
Normally, when by laying at least two local heating pipelines one by one and installing new pipeline, start working.Normally two of steel outstanding interior pipes 2.1 and 2.2 are facing with each other, and weld together subsequently, form welding 3.
In order to make two outer tubes 1.1 and 1.2 be connected to each other, carry out the installation of the sleeve 7 of welding polymer material.Preferably, the distance A between the length 5 of sleeve and end 1a and 1b of outer tube adds identical with the length that the desired width realizing the welding on every side is corresponding with overlapping 6 of sleeve.It is appropriate that overlap 6 long enough of sleeve, so that overlap 6 can participate in the welding of surrounding, the welding around this utilizes sleeve 7 to be welded together by outer tube 1.1 and 1.2.In one embodiment, the width of welding is around 40mm, and the overlap 6 at the often end place of sleeve is 100mm.
Along the longitudinal direction cutting-sleeve 7 of sleeve, to form longitudinal slit 8.Even if interior pipe 2 is intact, slit 8 makes to utilize the overlap of end 1a and 1b of outer tube to be arranged on by the sleeve 7 of cutting on the expose portion A of interior pipe 2 or interior pipe 2.1 and 2.2 becomes possibility.
Utilize the overlap of end 1a and 1b of outer tube, sleeve 7 be arranged on junction point, be arranged on interior pipe 2(or 2.1 and 2.2) expose portion A on.
By conduction and the permeable band 9 of molten plastic is cut into the length of the circumference exceeding outer tube.Band 9 can comprise net 9a, and this netting gear has the opening of the stainless steel expander metal arranged regularly on its surface, the stainless thin slice of such as perforated.
Between an outer tube 1.1 or 1.2 and sleeve 7, introduce band 9, so that the free end 10 of band projects upwards and passes slit 8, the end 10 of band enters in slit 8 the other way around.Then, in the relevant edge of slit, the end 10 of the band that folds back, to form interval between the end 10 in slit 8.Polymer material 9b can be utilized to net 9a to band 9() carry out lamination.Polymer material 9b is arranged on the side of net 9a, and when band 9 is arranged between outer tube 1 and sleeve 7, net 9a towards outer tube 1, with box lunch on the edge of slit and near the end 10 of folding band time, net 9a facing upwards.And, completely it is possible that when not affecting function of the present invention or advantage, use the band 9(not carrying out lamination to net 9a).
The size that width with 9 is less than overlapping 6.Welding obtains corresponding width, and thus, the width of welding is also less than overlapping size.
Before the applying of band 9 of transmitting welding heat, grind off the oxide layer on the polymer surfaces (frosting) of sleeve and pipeline.By this way, remove oxide and dirt, this oxide and dirt have negative influence to the intensity of welding and sealability.
In addition, for the net 9a(that heats between surface to be welded or the structure being at least similar to net) use cause heat along the whole length of welding and distributing very uniformly of width, therefore, result will be have very high-quality uniform welding.
Then, electrode 21 is all connected to by each for the folding end 10 of the band comprising current-carrying part (net 9a), this electrode is connected to power supply PU by feed cable, this power supply can supply such electric current, namely, this electric current is enough to the temperature welding region of band 9 and surrounding being heated to melt polymer material (plastic materials), so that they are melted in together to form welding by band around band.
Fig. 5 illustrates the device comprising fixture 20, and slit conduit sleeve 7, for outer tube is applied to interior pipe, is particularly applied to for the outer tube 1 of local heating pipeline with the pipeline of the type of local cooling pipe by this fixture.Fixture 20 comprises the flexible clamping band 22 being arranged to ring 23, so that the free end of clamping band 22.1 and 22.2 can be connected to the device 24-30 applying tension force.Clamping band 22(ring 23) sleeve 7 can be made to contact pipeline 1 by the impact of the device applying tension force when being arranged in (circumference of sleeve) around sleeve 7.The device 24-30 that can be applied to the applying tension force of (tension) ring 23 comprises on one end for the supporting part 24 against sleeve 7.In addition, the short circuit gear (break wheel) 25 having two of mutual distance parallel is arranged to be connected with supporting part 24, and wherein this interval is less than the diameter of sleeve significantly.Under the help of controlling device, the position of short circuit gear 25 can be regulated according to the size of sleeve, diameter, suitably, this controlling device should be arranged in the screw on each end of relevant short circuit gear 25, and wherein the rotation of screw makes the end of short circuit gear 25 be shifted towards or away from sleeve 7.Supporting part 24 and clamping band 22 interact and substantially apply chucking power at the whole circumference of sleeve.
Preferably, in order to stable contact, follow the curved surface of sleeve, supporting part 24 is spills.In addition preferably, supporting part 24(is at least at the part place on the surface contacted with sleeve 7) manufactured by electrically insulating material, this electrically insulating material also can bear the temperature of the rising that welding produces.In addition, advantageously, if the supporting part of instrument 24 is commutative, to guarantee the good pipeline being suitable for different-diameter, or supporting part 24 is made up of flexible material, and this flexible material makes the surface of contact be suitable for the relative diameter of pipeline.Clamping band 22 in ring 23 also uses the flexible material manufacture of the temperature bearing rising.Be applicable to, clamping band can be the band comprising polyamide fiber and teflon.Such as, clamping band 22 can with utilizing teflon to carry out subsequently to flood or the polyamide fiber manufacture of lamination.
Supporting part 24 comprises electrical insulation projection 26.Advantageously, in order to reduce the risk of carrying out weld period around whole circumference and occurring short circuit and damage, projection 26 comprises heat-resistant insulation material.Such as, can use relatively can be heat-resisting stupalith or similar material, and advantageously, use flexible material, with any modification carefully in accordance with existing form.Be intended to projection 26 to be inserted in slit 8, and enter between conductive strips 9 and the end 10 of being with as partition wall there, the end 10 of band is folding on the edge of slit.Projection 26 can be designed to antelabium or convex ridge.Projection 26 is displaceable, and it can skid off with outstanding, can change according to the wall thickness of sleeve the degree of depth that this projection enters the position of slit.
Electrode 21 is included in supporting part 24, and on every side of projection 26, an electrode, is connected to conductive strips 9 for by electric current, and as previously mentioned, the end 10 of conductive strips is folded up on every side of slit 8.Electrode 21 is spring-loaded, with provide with 9 Maximum Contact.Electrode 21 is arranged through feed cable M and is connected with power supply PU, this power supply can to electrode 21 supply regulate and controlled current controlled endurance.
Certainly, in innovation category of the present invention, the example of the design of the device 24-30 of the applying tension force provided can be changed, therefore, utilize the lever or roller bearing or other linear or non-linear methods that tension force are applied to band, application can be realized.
Before heating tape 9, fixture 20 is contacted with outer tube 1 with sleeve 7, and sleeve 7 is pressed on outer tube by this fixture, to be held in place between outer tube and the surface of sleeve with 9.
Before applying electric current, check, all parts should (such as, band 9 should in tram in their tram, and sleeve 7 is overlapping with end 1a and 1b of outer tube with the degree expected), and feed cable and electrode 21 are correctly connected to band 9.
Heat whole band 9, and around band 9 and together with the oxide-free frosting be included in band 9 is melted in polymer material 9b.Cut off electric current, and formed widely and the welding of melting completely around band 9.
Remove fixture 20, and perform identical welding operation at the second end place of sleeve.If two devices according to the present invention are all available, so certainly can perform the welding of surrounding in each end of sleeve simultaneously.
When the surrounding of executed sleeve 7 welding and clamper for disassembling 20 time, utilize router to remove the end 10 of band by the milling that U-type welds.Subsequently, carry out the welding of slit 8, form welding with the whole length 5 along sleeve.Whole length along slit 8 arranges continuous print sequence of welds.Preferably, will be called that the device of " extruder welding device " is for extruding welding, material is also supplied to welding by it.
Because it comprises the fact of little parts, device according to the present invention has low weight, and this significantly improves the working environment of installation personnel, because the work performing this character under inaccessible suitable complicated situation is general.In innovation category of the present invention, can freely in conjunction with the technical distinguishing characteristics of the above parts that described and accessory form, as long as result corresponds to the design described in Patent right requirement.

Claims (23)

1. the method for the welding of the sleeve (7) of the pipeline (1) of polymer material that can weld and the polymer material that can weld, wherein said pipeline has end (1a, 1b), wherein said method comprises: be arranged on the described end (1a, 1b) of described pipeline by described sleeve (7) in an overlapping arrangement; By arranging conductive strips (L between described pipeline (1) and described sleeve (7), 9) described sleeve (7) is soldered to the described end (1a of described pipeline, 1b), described band is porous for molten plastic; And by feed cable (M) by power supply (PU-DC; PU-AC) be connected to described band (L, 9), and for induced current to heat the polymer material of described band (L, 9) and surrounding, make them be melted in together to form welding around at described band (L, 9),
It is characterized in that
The original ambient temperature T welded described in the pre-test of the described band of heating 0,
Measure the described voltage U brought l,
Measure the electric current I being supplied to described band l,
The initial resistance R of described band was calculated before the described band of heating 0,
The described electric current being supplied to described band is caused to increase,
Based on described in described voltage and the Current calculation that records with resistance R,
Calculate the changes delta R of resistance,
Based on described resistance change calculations described in the increase Δ T of temperature, and by by the described original ambient temperature T of described welding 0the temperature T of described welding is calculated with the increase ΔTXiang Calais of the described temperature of described band w.
2. method according to claim 1, is characterized in that, by the temperature of the described welding calculated and the described predetermined final temperature T welded fcompare.
3. method according to claim 2, is characterized in that, as the described temperature T of described welding wreach the described predetermined final temperature T of described welding ftime, stop the supply of the electric current to described band.
4. method according to claim 1, is characterized in that, when realizing the predetermined variation Δ R of resistance of described band, stops the supply of the electric current to described band.
5. method according to claim 2, is characterized in that, as the described temperature T of described welding wreach the described predetermined final temperature T of described welding fand in predetermined time section at the described predetermined final temperature T of described welding fwhen lower maintenance is stablized, stop the supply of the electric current to described band.
6. method according to claim 1, is characterized in that, described electric current is direct current (d.c.).
7. method according to claim 1, is characterized in that, described electric current is alternating current (a.c.).
8. method according to claim 7, is characterized in that, uses at least one power supply (PU-AC) comprising quasi resonant power converter (B) to obtain the described electric current to described band (9) to be connected.
9. method according to claim 8, is characterized in that, described quasi resonant power converter (B) operation at frequencies in interval 20-50kHz.
10. method according to claim 1, is characterized in that, for the circuit counting impedance comprising described power supply (PU-AC), described feed cable (M) and described band (L, 9).
11. methods according to claim 10, is characterized in that, have the described impedance of the described circuit of the inductance in described feed cable (M) and resistance to calculate the described resistance R of described band based on compensation.
12. methods according to claim 1, is characterized in that, calculate the relative change R of the described resistance of described band rel, and the described relative change R of described resistance based on described band relcalculate the increase of the temperature of described welding.
13. methods according to claim 1, is characterized in that, supply described electric current, with the first object value T causing the described temperature of described band to reach temperature during the heating period 1.
14. methods according to claim 13, is characterized in that, supply described electric current, with the second desired value T causing the described temperature of described band to reach temperature during balance stage 2.
15. methods according to claim 14, is characterized in that, the first object value T of described temperature 1higher than the second desired value T of described temperature 2.
16. methods according to claim 1, is characterized in that, described voltage U is measured at tie point (K1, the K2) place arranged at contiguous described band l.
17. methods according to claim 1, is characterized in that, measure described voltage U at tie point (K1, the K2) place of the output being directly arranged in described power supply l.
18. 1 kinds of devices for the welding of the sleeve (7) of the pipeline (1) of polymer material that can weld and the polymer material that can weld, wherein said pipeline (1) has end (1a, 1b), and wherein said sleeve is arranged on the described end (1a of described pipeline in an overlapping arrangement, 1b), wherein said device comprises: conductive strips (L, 9), described conductive strips are porous for molten plastic, and described conductive strips are arranged between the described end (1a, 1b) of described pipeline and described sleeve (7); And for obtaining the power supply (PU-DC of electric current, PU-AC), described power supply is to be connected to described band (L, 9) to heat described band (L, 9) and the polymer material of surrounding, they are around melted in together to form welding at described band (L, 9)
It is characterized in that, described device comprises control & monitor unit (SR), and described control & monitor unit has: measure and regulate the device (CS) being supplied to the described electric current of described band; And measure and regulate the voltage U on described band (L, 9) ldevice (VS); Thermocouple (TS), for the original ambient temperature T of described welding 0measurement; And computing unit (CU), for the resistance R of described band (L, 9) and the temperature T of described welding wcalculating.
19. devices according to claim 18, is characterized in that, described band (L, 9) comprises stainless steel expander metal.
20. devices according to claim 18 or 19, is characterized in that, described power supply (PU-AC) comprises the quasi resonant power converter (B) for obtaining the described electric current to described band (9) to be connected.
21. devices according to claim 18, is characterized in that, described power supply (PU-DC) is DC electrical source.
22. devices according to claim 18, is characterized in that, described power supply (PU-AC) is ac power supply.
23. devices according to claim 18, is characterized in that, comprise described power supply (PU) and described band (L, 9) circuit has the tie point (K1 be associated with described band, K2), for the described voltage U measured on described band (L, 9) lthe connection of device (VS).
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EA024646B1 (en) 2016-10-31
KR20140032988A (en) 2014-03-17

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